Clamp.



w W m M .E f n... Si STL 3, isa pespesav@ showing the siam@ 25 He'cetofora clamps in@ @lambs cam to tgg y @ated papas?. wh ment. im away@ tionabfle around the damas com am a that sonic of the slots could be turned into internal notches by merely cutting away the substance of the har between adjacent slots. This, of course, would weaken the bar but would in no Way alter the invention which consists in locating the wedge within the outer edges of the bars and doing away with teeth on the outer edges of the bar where they are liable to be broken ofi'.

What I claim is:

1. A mold clamp, having in combination a plurality ot' bars laid so as to present their edges to the n'iold and to form a complete polygon of bars, two or more of the bars being laid angularly across the ends of each other, the said overlapping bars being provided eaeh with a plurality of slots comi pletely `within the outside edges oif such bar and angularly disposed with respect to the axis of such bar, sets of slots oi said over-- lapping bars being arranged to aline when the bars are at a given angularity, and one or more pairs of slots being arranged 4to overlap, andV one or more wedging pins driven into alined and overlapping slots and whose driving draws the bars across each other,` and across each others longitudinal axis in the direction of the slots to constrict the polygonal bar structure upon the mold.

2. A mold clamp, having in combination, a4 plurality of hars .laid so as to present their edges to the mold and to :form a complete polygon of bars, two or more of the bars being laid across the ends of each other, said overlapping bars being provided each with a plurality of slots completely within the outer edges oi'f said bar and angularly disposed 'with respect to the axis of said bar, the sets of slots of said overlapping bars being arranged to aline when the bars are at a given angular-ity, and the said slots having also substantially parallel and continuous side walls, one or more pairs of the slots being arranged to overlap, and

one or more {'lat wedging pins driven into alined and overlapping slots and whose driving not only draws the bars across each other and across each other-s longitudinal axis in the direction of' the slots to constrict the polygonai bar structure upon the mold, but also tends to make the bars assume predetermined' angular relations with respect to each other. v

3. A mold clamp, having in combination a plurality of bars forming a complete polygon of bars, the individual bars of which engage with one another at the ends by one bar passing through the end of the other bar, the said engaginff ends of the bars being provided each with a plurality or slots obliqnely crossing the axis of each bar, the slots of the two engaging bars be ing arranged to aline when the bars have the given angular relation of the side walls of the mold upon which the clamp is designed for use, and one or more sets of the slots being arranged to overlap, and one or more wedging pins for driving into alined and overlapping slots to draw the bars across each other and constrict the polygonal bar structure upon the mold.

In testimony whereof, I sign this speci lication in the presence of two witnesses. SAMUEL D. .BU'FIERWORTH. .Witnesses Fanny J. Nrcnons, Jason E. Niel-rois. 

